Coil Tube Boiler Operator's Manual: Models CB-200-CTB, CB-350-CTB and CB-500-CTB
B-5
Figure B4 - Coil Tube Boiler Ladder Schematic
THERMOSTAT
115 VOLTS
WHT
BK
GRN
RD
SEE NOTE 1
H
SWITCH
HI LIMIT
FLOW
AQUASTAT
OPERATING
SEE NOTE 2
BOILER CIRC. MOTOR
B
TD
DOUBLE POLE RELAY
R
T
CR
1
A
24 VAC
OIL PUMP
MOTOR
RUN - PRIME
60 Hz
PRIMING
N
CONTROL BOX
OUTSIDE BOILER
TERMINAL BLOCK
- CONNECTION AT
CUSTOMER POWER
- CONNECTION TO
NOTE 2:
NOTE 1:
PROVING SWITCH
ACTUATED BY BURNER MOTOR
N. C. HELD OPEN
CENTRIFUGAL SWITCH
WHT
GRN
BK
RD
400 WATTS BLOCK HEATER
AIR COMPRESSOR
T 1
CONTROL
L-140 BLOCK THERMOSTAT
140°
AIR PRESSURE
CELL
CAD
BURNER MOTOR
M 3
120°
BLK
ORG
IGNITION TRANSF.
SPARK GAP
LOW VOLTAGE
OIL PRIMARY
F 1
F 2
CONTACT
ALARM
POWER ON
PUMP ON
HOUR METER
A
OIL SOL.
AIR SOL.
T 2
WHT
L-130 NOZZLE THERMOSTAT
140 WATTS NOZZLE HEATER
CUT - OFF
LO WATER
1
2
3
5
4
P
PROBE
DRAFT INDUCER
NOTE 3:
SEE NOTE 3
(OPTIONAL)
BL
CB-350-CTB and CB-500-CTB
PRIMARY CONTROL IS
SHOWN. CB-200-CTB
PRIMARY CONTROL
IS SIMILAR WITH NO
ALARM.
DPDT TOGGLE SWITCH
ON BOILER CABINET
TOGGLE DOWN: BURNER
TOGGLE UP: PRIME PUMP
TDR TIMER CONTACT
CLOSES INSTANTANEOUSLY
WHEN RELAY IS ENERGIZED
(TRIGGERED BY CR1) AND
OPENS 10 MINUTES AFTER
CR1 IS DE-ENERGIZED
Содержание CB-200-CTB
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